Taylor, who was once close to his son, has not talked to his son in
months. Young Mark and his mother live with a relative in Espanola,
N.M., surviving on food stamps and disability income.
When ABCNews.com talked to Mark, his speech was slurred and
incoherent. His mother, Donna Taylor, was equally distraught. "We are
living like gypsies," she said.

"I need help so much," she told ABCNews.com, intermittently coughing
and crying. "I'm so scared. He's almost choked me several times. He
cannot think logically anymore."

Mark could only manage to say, "I don't want to talk about it anymore.
It's America's guilt."

His father described Mark as "paranoid and delusional," and said
mental health officials diagnosed his son with a genetic bipolar
disorder that was exacerbated by the trauma of Columbine.

Mark, whom police referred to as "dead kid walking," was hit when the
killers aimed at students sitting on the grassy knoll adjacent to some
steps. He fell to the ground and played dead while three others
escaped uninjured.

'Bowling for Columbine'

He spent 36 days in the hospital and was tutored during his
convalescence but never graduated from high school. "It was pretty horrific," said his father. "Basically, you're in shock."

After the shootings, Mark participated in the making of Michael
Moore's 2002 anti-gun documentary, "Bowling for Columbine," and wrote
a book about his inspirational recovery, "I Asked, God Answered: A
Columbine Miracle."

The book logged some sales early on, but Mark was "not in a state" to
promote it, said a spokesman for Tate Publishing, which released the
book in 2006.

Donna and Mark Taylor, who have six other children, divorced in the
aftermath of Columbine. Their son experienced several mental
breakdowns and was hospitalized three times, according to both
parents.

Mark's mother believes the antidepressants doctors prescribed were
"killing" her son, and she took him off all medications. In 2006, they
began a three-year odyssey moving from Colorado to Kansas City to live
with friends. For a while, they were living in a homeless shelter in
Buena Park, Calif.

Shooting Victim Too Sick to Work

Today, the 26-year-old is too sick to work and has only a Lexus to
show for the estimated $185,000 he received from the Columbine
victim's fund.

"He blew it all," said his mother. "It's hard to control someone that
age."

Like the rest of the nation, 10 years after Columbine's massacre, Donna
Taylor "cannot let this thing go," said her ex-husband.

"The mere fact is that guns aren't the only problem," said Donna
Taylor. "Life is so full of darkness. School should be the safest
place, not the most dangerous place for your child."

Retired teacher Kent Friesen has channeled his own grief into the plight of
returning Iraq War veterans, many of whom suffer from
post-traumatic stress.

"I am passionate about this," he said.

A 2007 American Psychiatric Association survey of soldiers showed
overall prevalence of PTSD was 16.6 percent. But 31.8 percent of
those wounded or injured reported having the disorder.

Today, Friesen cannot talk about the veterans without breaking down.
"I admire those men," he said. "I hope they get the help that they
need."

These days, he finds solace making furniture in his workshop and
volunteering for a church youth group. Friesen cannot view violent
movies without crying, but he relies on the patience of his wife and
two sons, 30 and 32, to steer him clear of emotional triggers.

"I will put this [interview] on a back burner and deal with it later,"
Friesen told ABCNews.com. "I probably won't sleep well tonight. The
thoughts and things race in my mind.

"But that's OK," he said. "That's what I have to do. I don't want to
bury it, and my release is my tears."

Next: The Columbine Shootings, 10 Years After: Portrait of the Killers

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